Numerical Study on the Thermal Performance of a Shell and Tube Phase Change Heat Storage Unit during Melting Process | Zendy

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Numerical Study on the Thermal Performance of a Shell and Tube Phase Change Heat Storage Unit during Melting Process

Author(s) -

Li Wei,

Kong Chengcheng

Publication year - 2014

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

ISSN - 1687-8132

DOI - 10.1155/2014/360283

Subject(s) - phase change material , heat transfer , materials science , thermal energy storage , mechanics , inlet , thermal , thermodynamics , shell and tube heat exchanger , tube (container) , composite material , mechanical engineering , engineering , physics

This work presents a numerical study of the thermal performance in a shell and tube phase change heat storage unit. Paraffin wax as phase change material (PCM) is filled in the shell space. The heat transfer fluids (HTFs: air and water) flow through the tube and transfer the heat to PCM. A mathematical model involving HTF and PCM is developed to analyze the thermal performance of the phase change heat storage unit and is validated with experimental data. Numerical investigation is conducted to evaluate the effect of HTF inlet velocity on the HTF outlet temperature, Nu, and melt fraction when air or water is used as HTF. Results indicate that the air inlet velocity has a great effect on the air outlet temperature and heat transfer rate, and the water inlet velocity has little effect on the water outlet temperature. The investigated results can provide a reference for designing phase change heat storage system.

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